[generator] Extend skipInvokerMethods support to interfaces.

tests/generator-Tests/Unit-Tests/CodeGeneratorTests.cs

@@ -352,6 +352,32 @@ public void SkipInvokerMethodsMetadata ()
 			Assert.False (writer.ToString ().Contains ("public abstract Com.Xamarin.Android.MyBaseClass DoStuff ();"), $"was: `{writer}`");
 		}
 
+		[Test]
+		public void SkipInterfaceInvokerMethodsMetadata ()
+		{
+			var xml = @"<api>
+			  <package name='java.lang' jni-name='java/lang'>
+			    <class abstract='false' deprecated='not deprecated' final='false' name='Object' static='false' visibility='public' jni-signature='Ljava/lang/Object;' />
+			  </package>
+			  <package name='com.xamarin.android' jni-name='com/xamarin/android'>
+			    <interface abstract='false' deprecated='not deprecated' extends='java.lang.Object' extends-generic-aware='java.lang.Object' jni-extends='Ljava/lang/Object;' final='false' name='MyInterface' static='false' visibility='public' jni-signature='Lcom/xamarin/android/MyInterface;' skipInvokerMethods='com/xamarin/android/MyInterface.countAffectedRows()I'>
+			      <method abstract='true' deprecated='not deprecated' final='false' name='countAffectedRows' jni-signature='()I' bridge='false' native='false' return='int' jni-return='I' static='false' synchronized='false' synthetic='false' visibility='public'></method>
+			    </interface>
+			  </package>
+			</api>";
+
+			var gens = ParseApiDefinition (xml);
+			var iface = gens.Single (g => g.Name == "IMyInterface");
+
+			generator.Context.ContextTypes.Push (iface);
+			generator.WriteType (iface, string.Empty, new GenerationInfo ("", "", "MyAssembly"));
+			generator.Context.ContextTypes.Pop ();
+
+			// Ensure the invoker for 'countAffectedRows' isn't generated
+			Assert.False (writer.ToString ().Contains ("static Delegate cb_countAffectedRows;"), $"was: `{writer}`");
+			Assert.False (writer.ToString ().Contains ("InvokeAbstractInt32Method"), $"was: `{writer}`");
+		}
+
 		[Test]
 		public void CompatVirtualMethod_Class ()
 		{

tools/generator/Java.Interop.Tools.Generator.Importers/XmlApiImporter.cs

@@ -331,6 +331,10 @@ public static InterfaceGen CreateInterface (XElement pkg, XElement elem, CodeGen
 					 !options.SupportNestedInterfaceTypes
 			};
 
+			if (elem.Attribute ("skipInvokerMethods")?.Value is string skip)
+				foreach (var m in skip.Split (new char [] { ',', ' ', '\n', '\r' }, StringSplitOptions.RemoveEmptyEntries))
+					iface.SkippedInvokerMethods.Add (m);
+
 			FillApiSince (iface, pkg, elem);
 			SetLineInfo (iface, elem, options);
 

tools/generator/Java.Interop.Tools.Generator.ObjectModel/ClassGen.cs

@@ -11,7 +11,6 @@ namespace MonoDroid.Generation
 	public class ClassGen : GenBase
 	{
 		bool fill_explicit_implementation_started;
-		HashSet<string> skipped_invoker_methods;
 
 		public List<Ctor> Ctors { get; private set; } = new List<Ctor> ();
 
@@ -356,8 +355,6 @@ public override void ResetValidation ()
 			base.ResetValidation ();
 		}
 
-		public HashSet<string> SkippedInvokerMethods => skipped_invoker_methods ??= new HashSet<string> ();
-
 		public override string ToNative (CodeGenerationOptions opt, string varname, Dictionary<string, string> mappings = null)
 		{
 			if (opt.CodeGenerationTarget == CodeGenerationTarget.JavaInterop1) {

tools/generator/Java.Interop.Tools.Generator.ObjectModel/GenBase.cs

@@ -17,6 +17,7 @@ public abstract class GenBase : IGeneratable, ApiVersionsSupport.IApiAvailabilit
 		protected bool iface_validation_failed;
 		protected GenBaseSupport support;
 		protected bool validated = false;
+		HashSet<string> skipped_invoker_methods;
 
 		readonly List<string> implemented_interfaces = new List<string> ();
 		readonly Dictionary<string, Method> jni_sig_hash = new Dictionary<string, Method> ();
@@ -854,6 +855,8 @@ bool ReturnTypeMatches (Method m, Method mm)
 
 		public bool ShouldGenerateAnnotationAttribute => IsAnnotation;
 
+		public HashSet<string> SkippedInvokerMethods => skipped_invoker_methods ??= new HashSet<string> ();
+
 		public void StripNonBindables (CodeGenerationOptions opt)
 		{
 			// Strip out default interface methods if not desired

tools/generator/SourceWriters/InterfaceInvokerClass.cs

@@ -69,7 +69,7 @@ public InterfaceInvokerClass (InterfaceGen iface, CodeGenerationOptions opt, Cod
 
 			Constructors.Add (new InterfaceInvokerConstructor (opt, iface, context));
 
-			AddMemberInvokers (iface, new HashSet<string> (), opt, context);
+			AddMemberInvokers (iface, new HashSet<string> (), iface.SkippedInvokerMethods, opt, context);
 		}
 
 		static HashSet<InterfaceGen> GetCompleteImplementedInterfaces (HashSet<InterfaceGen> ifaces, InterfaceGen toplevel)
@@ -81,15 +81,15 @@ static HashSet<InterfaceGen> GetCompleteImplementedInterfaces (HashSet<Interface
 			return ifaces;
 		}
 
-		void AddMemberInvokers (InterfaceGen iface, HashSet<string> members, CodeGenerationOptions opt, CodeGeneratorContext context)
+		void AddMemberInvokers (InterfaceGen iface, HashSet<string> members, HashSet<string> skipInvokers, CodeGenerationOptions opt, CodeGeneratorContext context)
 		{
 			AddPropertyInvokers (iface, iface.Properties.Where (p => !p.Getter.IsStatic && !p.Getter.IsInterfaceDefaultMethod), members, opt, context);
-			AddMethodInvokers (iface, iface.Methods.Where (m => !m.IsStatic && !m.IsInterfaceDefaultMethod), members, opt, context);
+			AddMethodInvokers (iface, iface.Methods.Where (m => !m.IsStatic && !m.IsInterfaceDefaultMethod), members, skipInvokers, opt, context);
 			AddCharSequenceEnumerators (iface);
 
 			foreach (var i in iface.GetAllDerivedInterfaces ()) {
 				AddPropertyInvokers (iface, i.Properties.Where (p => !p.Getter.IsStatic && !p.Getter.IsInterfaceDefaultMethod), members, opt, context);
-				AddMethodInvokers (iface, i.Methods.Where (m => !m.IsStatic && !m.IsInterfaceDefaultMethod && !iface.IsCovariantMethod (m) && !(i.FullName.StartsWith ("Java.Lang.ICharSequence", StringComparison.Ordinal) && m.Name.EndsWith ("Formatted", StringComparison.Ordinal))), members, opt, context);
+				AddMethodInvokers (iface, i.Methods.Where (m => !m.IsStatic && !m.IsInterfaceDefaultMethod && !iface.IsCovariantMethod (m) && !(i.FullName.StartsWith ("Java.Lang.ICharSequence", StringComparison.Ordinal) && m.Name.EndsWith ("Formatted", StringComparison.Ordinal))), members, skipInvokers, opt, context);
 				AddCharSequenceEnumerators (i);
 			}
 		}
@@ -113,10 +113,13 @@ void AddPropertyInvokers (InterfaceGen iface, IEnumerable<Property> properties,
 				Properties.Add (new InterfaceInvokerProperty (iface, prop, opt, context));
 			}
 		}
-
-		void AddMethodInvokers (InterfaceGen iface, IEnumerable<Method> methods, HashSet<string> members, CodeGenerationOptions opt, CodeGeneratorContext context)
+		
+		void AddMethodInvokers (InterfaceGen iface, IEnumerable<Method> methods, HashSet<string> members, HashSet<string> skipInvokers, CodeGenerationOptions opt, CodeGeneratorContext context)
 		{
 			foreach (var m in methods) {
+				if (skipInvokers.Contains ($"{m.DeclaringType.RawJniName}.{m.JavaName}{m.JniSignature}"))
+					continue;
+
 				var sig = m.GetSignature ();
 
 				if (members.Contains (sig))